Wheel Spacing Ratios

[Deke]

Originally Posted by Scott Kozutsky

I don't think it's accurate to assume that the center wheels in a 6wd center drop are equally loaded. The center of mass is usually much closer to the center than either side of the robot and usually the center wheels take substantially more load (tread wear makes this very apparent).

Agreed, its really CoG dependent. This is more of a worst case scenario of centered weight on 4 of the 6 wheels.

Originally Posted by GeeTwo

I'm not really sure where your numbers are coming from; are you assuming a certain length, width, or frame perimeter as constant, and what are you varying to get the different categories?

The middle row is a square configuration for wheel contact of the outermost wheels (1.00 W/L for 4 wheels). The 4wd is the baseline, and the other wheel configurations are calculated based on the assumptions. They are unit less.